8/30/10: Packing for Mars

Salt Lake City, Utah – Popular science writer Mary Roach says that when planning a space mission, everything that's taken for granted on Earth has to be "rethought, relearned and rehearsed." After all, flying a flag with no wind or managing to urinate in zero gravity is no easy feat. Roach's latest book is called "Packing for Mars," and Monday, she joins Doug for a look at space exploration and what it teaches us about being human.